CN103095286A - Universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on phase inverter - Google Patents
Universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on phase inverter Download PDFInfo
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- CN103095286A CN103095286A CN2011103340730A CN201110334073A CN103095286A CN 103095286 A CN103095286 A CN 103095286A CN 2011103340730 A CN2011103340730 A CN 2011103340730A CN 201110334073 A CN201110334073 A CN 201110334073A CN 103095286 A CN103095286 A CN 103095286A
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Abstract
The invention discloses a universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on a phase inverter. The UART voice communication signal reversal phase circuit is mainly composed of a phase inverter circuit, a normal UART signal end, a phase reversed UART signal end and a voice frequency digital power end, wherein the normal UART signal end, the phase reversed UART signal end and the voice frequency digital power end are connected with the phase inverter circuit. The UART voice communication signal reversal phase circuit has the advantages of being simple in structure, low in cost, and good in phase reversal effect.
Description
Technical field
The present invention relates to negative circuit, specifically refer to the UART voice communication signals negative circuit based on inverter.
Background technology
Inverter is can be with phasing back 180 degree of input signal, and sort circuit is applied in analogue circuit, for example, the audio frequency amplification, clock oscillator etc.In electronic circuitry design, often to use inverter
The non-class inverter of TTL.The electric circuit constitute and operation principle: the inverter of typical TTL NAND gate circuit the electric circuit constitute.
Input stage---transistor T 1 and resistance R b1 consist of.
Intergrade---transistor T 2 and resistance R c2, Re2 consist of.
Output stage---transistor T 3, T4, D and resistance R c4 consist of, push-pull structure, and when normal operation, T4 and T3 be a cut-off always, and another is saturated.
Operation principle: when input Vi=3.6V (high level) Vb1=3.6+0.7=4.3V is enough to make T1 (bc knot) T2 (be knot) T3 (be knot) conducting simultaneously, once conducting Vb1=0.7+0.7+0.7=2.1V (fixed value), this moment, the V1 emitter junction must end (inversion magnifying state).Vc2=Vces+Vbe2=0.2+0.7=0.9V is not enough to T3 and D conducting simultaneously, and T4 and D all end.V0=0.2V (low level).As input Vi=0.2V (low level), the Vb1=0.2+0.7=0.9V deficiency is so that T1 (bc knot) T2 (be knot) T3 (be knot) conducting simultaneously, T2 T3 all ends, and Vcc---Rc2----T4---D---load simultaneously forms path, the equal conducting of T4 and D.V0=Vcc-VRc2 (can omit)-Vbe4-VD=5-0.7-0.7=3.6 (high level)
Conclusion: input highly, export low; Input lowly, export high (NOT logic).
TTL inverter features.
The TTL advantage; 1, operating rate is fast; 2, carrying load ability is strong; 3, transmission characteristic is good.
The voltage-transfer characteristic of TTL inverter; Voltage-transfer characteristic refers to that output voltage follows the relation curve that input voltage changes, i.e. UO=f (uI) functional relation.Its curve roughly is divided into four sections: cut-off region: when UI≤0.6V, T1 is operated in dark saturation condition, Uces1＜0.1V, and Vbe2＜0.7V, thus T2, T3 cut-off, the equal conducting of D, T4, output high level UOH=3.6V.The voltage-transfer characteristic linear zone of TTL inverter: when 0.6V≤UI＜1.3V, 0.7V≤Vb2＜1.4V, T2 begins conducting, and T3 is conducting not yet.This moment, T2 was in magnifying state, and its collector voltage Vc2 descends along with the increase of UI, and output voltage U O is also descended.CD section (break over region): 1.3V≤UI＜1.4V, when UI is slightly larger than 1.3V, the equal conducting of T2 T3, T3 enters saturation condition, and output voltage U O descends rapidly.The saturation region: when UI 〉=1.4V, along with increasing T1, UI enters the inversion operating state, the D cut-off, the T4 cut-off, T2, T3 are saturated, thereby output low level UOL=0.3V.
In the circuit of voice communication, according to the specific (special) requirements of speech chip, generally with UART(Universal Asynchronous Receiver ﹠ dispensing device) signal of communication need to carry out anti-phase processing, is the quality that guarantees voice communication, therefore need the circuit structure of anti-phase processing simple, and cost is low.
Summary of the invention
The object of the present invention is to provide a kind of simple in structurely, cost is low, based on the UART voice communication signals negative circuit of inverter.
Implementation of the present invention is as follows: based on the UART voice communication signals negative circuit of inverter, mainly be made of the normal UART signal end of inverter circuit and connection and inverter circuit, UART signal end, digital audio power end after anti-phase.
Described inverter circuit comprises inverter U13, and described inverter U13 comprises that 5 pins are respectively: IN pin 1, GND pin 2, NC pin 3, OUT pin 4, VCC pin 5; Described IN pin 1 is connected with normal UART signal end; Described GND pin 2 ground connection; OUT pin 4 connects the UART signal end after anti-phase; Described VCC pin 5 is connected with the digital audio power end, and described VCC pin 5 also is in series with capacitor C 31 and ground wire successively.
The signal of described inverter U13 is INV_NL17SH04.
The electric capacity of described capacitor C 31 is 100nF.
The electric capacity of described capacitor C 31 is 100-105nF or 95-100nF.
based on foregoing, workflow of the present invention is: when normal UART signal end input signal is 1, normal UART signal 1 is through IN pin 1 input of inverter U13, processing signals through inverter becomes 0, signal after it is anti-phase is finally by OUT pin 4 outputs of crossing inverter U13, be uploaded to the UART signal end after anti-phase, in like manner, when normal UART signal end input signal is 0, normal UART signal 0 is through IN pin 1 input of inverter U13, processing signals through inverter becomes 1, signal after it is anti-phase is finally by OUT pin 4 outputs of crossing inverter U13, be uploaded to the UART signal end after anti-phase.
The invention has the advantages that: simple in structure, cost is low, and is anti-phase effective.
Description of drawings
Fig. 1 is overall structure schematic diagram of the present invention.
Embodiment
Embodiment one
As shown in Figure 1.
Based on the UART voice communication signals negative circuit of inverter, mainly consisted of by the normal UART signal end of inverter circuit and connection and inverter circuit, UART signal end, digital audio power end after anti-phase.
Described inverter circuit comprises inverter U13, and described inverter U13 comprises that 5 pins are respectively: IN pin 1, GND pin 2, NC pin 3, OUT pin 4, VCC pin 5; Described IN pin 1 is connected with normal UART signal end; Described GND pin 2 ground connection; OUT pin 4 connects the UART signal end after anti-phase; Described VCC pin 5 is connected with the digital audio power end, and described VCC pin 5 also is in series with capacitor C 31 and ground wire successively.
The signal of described inverter U13 is INV_NL17SH04.
The electric capacity of described capacitor C 31 is 100nF.
The electric capacity of described capacitor C 31 is 100-105nF or 95-100nF.
when normal UART signal end input signal is 1, normal UART signal 1 is through IN pin 1 input of inverter U13, processing signals through inverter becomes 0, signal after it is anti-phase is finally by OUT pin 4 outputs of crossing inverter U13, be uploaded to the UART signal end after anti-phase, in like manner, when normal UART signal end input signal is 0, normal UART signal 0 is through IN pin 1 input of inverter U13, processing signals through inverter becomes 1, signal after it is anti-phase is finally by OUT pin 4 outputs of crossing inverter U13, be uploaded to the UART signal end after anti-phase.
As mentioned above, can well realize the present invention.
Claims (5)
1. based on the UART voice communication signals negative circuit of inverter, it is characterized in that: mainly consisted of by the normal UART signal end of inverter circuit and connection and inverter circuit, UART signal end, digital audio power end after anti-phase.
2. the UART voice communication signals negative circuit based on inverter according to claim 1, it is characterized in that: described inverter circuit comprises inverter U13, and described inverter U13 comprises that 5 pins are respectively: IN pin 1, GND pin 2, NC pin 3, OUT pin 4, VCC pin 5; Described IN pin 1 is connected with normal UART signal end; Described GND pin 2 ground connection; OUT pin 4 connects the UART signal end after anti-phase; Described VCC pin 5 is connected with the digital audio power end, and described VCC pin 5 also is in series with capacitor C 31 and ground wire successively.
3. the UART voice communication signals negative circuit based on inverter according to claim 2, it is characterized in that: the signal of described inverter U13 is INV_NL17SH04.
4. the UART voice communication signals negative circuit based on inverter according to claim 2, it is characterized in that: the electric capacity of described capacitor C 31 is 100nF.
5. the UART voice communication signals negative circuit based on inverter according to claim 2, it is characterized in that: the electric capacity of described capacitor C 31 is 100-105nF or 95-100nF.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103340730A CN103095286A (en) | 2011-10-28 | 2011-10-28 | Universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on phase inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103340730A CN103095286A (en) | 2011-10-28 | 2011-10-28 | Universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on phase inverter |
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| CN103095286A true CN103095286A (en) | 2013-05-08 |
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| CN2011103340730A Pending CN103095286A (en) | 2011-10-28 | 2011-10-28 | Universal asynchronous receiver transmitter (UART) voice communication signal reversal phase circuit based on phase inverter |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059054A (en) * | 1990-08-11 | 1992-02-26 | 宋声和 | Partially-filtered circuit |
| CN101262398A (en) * | 2007-12-14 | 2008-09-10 | 华南理工大学 | Monitoring sub-station communication network for pollution source monitoring system |
| CN202261230U (en) * | 2011-10-28 | 2012-05-30 | 成都高新区尼玛电子产品外观设计工作室 | UART (Universal Asynchronous Receiver/Transmitter) voice communication signal inverting circuit based on phase inverter |
-
2011
- 2011-10-28 CN CN2011103340730A patent/CN103095286A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1059054A (en) * | 1990-08-11 | 1992-02-26 | 宋声和 | Partially-filtered circuit |
| CN101262398A (en) * | 2007-12-14 | 2008-09-10 | 华南理工大学 | Monitoring sub-station communication network for pollution source monitoring system |
| CN202261230U (en) * | 2011-10-28 | 2012-05-30 | 成都高新区尼玛电子产品外观设计工作室 | UART (Universal Asynchronous Receiver/Transmitter) voice communication signal inverting circuit based on phase inverter |
Non-Patent Citations (1)
| Title |
|---|
| SEMICONDUCTOR COMPONENTS INDUSTRIES: "NL17SH04", 《ON SEMICONDUCTOR(WWW.ONSEMI.COM/PUB/COLLATERAL/NL17SH04-D)》 * |
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Application publication date: 20130508 |